module demo::lang::Func::Func
rascal-0.34.0
Usage
import demo::lang::Func::Func;
syntax Ident
lexical Ident = [a-zA-Z][a-zA-Z0-9]* !>> [a-zA-Z0-9];
syntax Natural
lexical Natural = [0-9]+ !>> [0-9];
syntax LAYOUT
lexical LAYOUT = [\t-\n\r\ ];
syntax LAYOUTLIST
layout LAYOUTLIST = LAYOUT* !>> [\t-\n\r\ ] ;
syntax Prog
start syntax Prog = prog: Func* ;
syntax Func
syntax Func = func: Ident name "(" {Ident ","}* ")" "=" Exp;
syntax Exp
syntax Exp
= let: "let" {Binding ","}* "in" Exp "end"
| cond: "if" Exp "then" Exp "else" Exp "end"
| bracket "(" Exp ")"
| var: Ident
| nat: Natural
| call: Ident "(" {Exp ","}* ")"
| address: "&" Ident
> deref: "*" Exp
> non-assoc (
left mul: Exp "*" Exp
| non-assoc div: Exp "/" Exp
)
> left (
left add: Exp "+" Exp
| left sub: Exp "-" Exp
)
>
non-assoc (
non-assoc gt: Exp "\>" Exp
| non-assoc lt: Exp "\<" Exp
| non-assoc geq: Exp "\>=" Exp
| non-assoc leq: Exp "\<=" Exp
)
>
right assign: Exp ":=" Exp
>
right seq: Exp ";" Exp
;
syntax Binding
syntax Binding = binding: Ident "=" Exp;